I'm 100% sure it will be called Super Mario 3DS. Thats the only name i've seen for it and on all the sites listing release dates, its release date is confirmed and there is no "working name" or "working title" or "tentative name" by it. So i'm pretty sure that it will be called Super Mario 3DS
1. It can't be called "Super Mario 3DS", because that would be like calling Halo 3 "Halo 360". LOL.